Shutter for motion-picture-projecting apparatus having interlocking parts and means for maintaining the parts in assembled relation and for mounting the shutter on a projecting apparatus.



I F. C. HAMILTON. SHUTTER F 0R MOTION PICTURE PROJECTING APPARATUS HAVING INTERLOCKING PARTS AND MEANS FOR MAINTAINING THE PARIS IN ASSEMBLED RELATION AND FOR MOUNTING THE SHUTTER ON A PROTECTING APPARATUS.

. APPLIQATION FILED SEPT-30, 1915.

. 1,214,301., I Patented Jan. 30, 1917 TEll- 'rnrnn'r onnion FRANK G, HAMILTON, F NEW 'ZI'ORII, N. ASSIGNOR TO EUREKA PROJECTOR DEVICE C3. INC., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

SHUTTER FOR MO'IION-iEICTURE-PROJECTING APPARATUS HAVING INTERLOCKING PARTS AND MEANS FOR MAINTAINING THE'PARTS IN ASSEMBLED RELATION AND FORYMGUNTING THE SHUTTER ON A PROJECTING AJPFARA'I?US Specification of Letters Patent,

Application filed September 30, 1915. Serial No. 53,235.

ture art, and concerns itself particularly with improvements in revolving shutters for use in projecting apparatus.

One of the objects of the invention is to provide a shutter in which the usual opaque vanes are replaced by glass sectors, or vanes, which, while transparent, cause a destruction of focus or the diffusion of light rays passing through them, and to arrange for ready and efiective assembling of such vanes with the usual revolving shutter shaft of a pro jeet' apparatus.

(loner objects and. aims of the invention, more or less broad than those stated above, together with the advantages inherent, will i i art obvious and in part specifically to in the course of the following of the elements, combinations, arrangements of parts, and applications of inciples constituting? the invention; and nrotection contempiated will? from the claim wings, are a i; floatron,

silient tongue 8.

transparent materi l seats or slots each of which is intended for dove-tail or interlocking engagement with the cooperant and correspondingly shaped shank of a vane 6. The seat member is transverselycentrally bored at 'Zto accommodate a sleeve 8, exteriorly threaded adjacent one end at 8, and provided with a plurality of slots 8 as best shown in Figs. 3 and 4. These slots establish a preferably re- A duplicate pair of side shields 99, each of the outline indicated in Fig. 1, are centrally bored so as also to take about the sleeve 8 when said side shields are riveted or bolted to the seat member 5 to maintain said seat member and vanesfi interlocked. Each vane 6 is thicker in its shank than elsewhere, and the arcuate edgesof side shields 9-9 are inturned against arcuate shoulders, one carried on each side of each vane and marking'the merging of a vane blade into the shank. A trifurcated flat spring 10 is riveted to one of said side shields as shown best in Fig. 1. A collar 11 is fixedly mounted on sleeve 8, and anchored in place by the application of a suitable screw threaded into the recew and bearing against tongue 8. The sleeve 8 and its 001- lar 11 may then be siipped on the revolving shutter shaft 12, and said collar is thereupon fixedly adjustable longitudinally of said shaft, by means'of a spiral adjustment of set screw 11% The setting of this screw frictionailyclamps the tongue 8 of sleeve 8 against the sha A fillet orhoop is may he employed as shown, passing area the outer arouate edges of the vanes. ash the vanes 6, instead being op preferabiy of a when halted predeterminedly tra sversely of the light rays the ill nator within the projecting paratus, fuses s is. light rays to onto utly immobile Since, there vantageously referabiy bet is desirable he interposed "bed, whereby r rated on the he cons "acted in 1 mg a unitary that a Molnar in the means, new the assembiea Patented Jan. 30, 1917.

is usual screen shaft 12. This shock-absorbing means is approximately equal to the outside diameter of the particular shutter shaft 12.

Inasmuch as many changes could be made in the above construction, and many appar-' ently Widely difierent embodiments of my invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shallbe interpreted as illustrative andnot in a limiting sense. It is also to be understood that the language used in the follow ingclaims is intended to cover all the generic and specific features of the invention herein described and all statements of the scope of the inventionwhich, as a matter of language, might be said to fall therebetween.

I claim:

1. In a built-up rotatable shutter havinga plurality of assembled and projecting vanes, a hub portion, and an auxiliary hub portion adapted to be adjustably fixed Within the first mentioned hub portion, said. auxiliary hub portion including a sleeve, said sleeve carrying a spirally adjustable nut on one end, and an adjustable collar fixable adjacent its other end.

2. In a built-up rotatable shutter havinga plurality of assembled and projecting vanes, a .hub portion, and an auxiliary hub portion adapted to be adjustably fixed within the first mentioned hub portion, said auxiliary hub portion including a sleeve, said sleeve carrying a spirally adjustable nut on one naiaaoi end and an adjustable collar fixable adjacent its other end, and a spring interposed between said shutter and the collar.

3. In a built-up rotatable shutter having a plurality of assembled and projecting vanes, a hub portion, and an auxiliary hub portion adapted to be adjustably fixed within the first mentioned hub portion, said auxiliary hub portion including a sleeve, said sleeve carrying a spirally adjustable nut on one end, and an adjustable collar fixable adjacent its other end, and a leaf-spring carried by the shutter and straddling said sleeve.

4. In a built-up rotatable shutter having a plurality of assembled and projecting vanes, a hub portion, and an auxiliary hub portion adapted to be adjustably fixed within the first mentioned hub portion, said auxiliary hub portion including a sleeve, and carrying means for clamping the first mentioned hub portion on said sleeve and for clamping said sleeve on the shutter shaft, said means i11- cluding a resilient tongue extending from and longitudinally of the sleeve.

5. In a built-up rotatable shutter, a body portion provided with a seat, a vane having a shank portion adapted to fit said seat and having also a light-diffusing portion, said light-difiusing portion being thinner than the shank and the junction between the shank and the light-diffusing portion being defined by a shoulder on each side of the vane and a shield on each-side of the body portion having a flange engaging over the said shoulder.

6. In a built-up rotatable shutter, a body portion provided Witha seat, a vane having a shank adapted to fit said seat and having also a light-diffusing portion, and a cover for said body portion, said cover and the vane having inter-engaging portions.

In testimony whereof I afiix my signature in presence of tWo Witnesses.

FRANK C. HAMILTON. Witnesses:

Rosa A. KRAUs, FRANK .I. KENT. 

